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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Ho Nieh nominated to the NRC
Nieh
President Trump recently nominated Ho Nieh for the role of commissioner in the Nuclear Regulatory Commission through the remainder of a term that will expire June 30, 2029.
Nieh has been the vice president of regulatory affairs at Southern Nuclear since 2021, though he is currently working as a loaned executive at the Institute of Nuclear Power Operations, where he has been for more than a year.
Nieh’s experience: Nieh started his career at the Knolls Atomic Power Laboratory, where he worked primarily as a nuclear plant engineer and contributed as a civilian instructor in the U.S. Navy’s Nuclear Power Program.
From there, he joined the NRC in 1997 as a project engineer. In more than 19 years of service at the organization, he served in a variety of key leadership roles, including division director of Reactor Projects, division director of Inspection and Regional Support, and director of the Office of Nuclear Reactor Regulation.
Roger D. Spence, Anthony L. Wright
Nuclear Technology | Volume 77 | Number 2 | May 1987 | Pages 150-160
Technical Paper | Nuclear Safety | doi.org/10.13182/NT87-A33980
Articles are hosted by Taylor and Francis Online.
Including fission product vapor interactions with aerosols in reactor accident calculations can significantly alter the predicted consequences of a given accident. For example, a high-velocity, short residence time accident can transport significant amounts of tellurium outside the reactor vessel on the aerosols rather than having the tellurium reacted on the vessel’s metal surfaces. In another scenario, a relatively stagnant situation allows equilibration of the vapor/aerosol interactions and deposition of the aerosols inside the core region. Consequently, most of the fission product vapors remain in the core region with the deposited aerosols. The sorption isotherms of CsOH-Ag, CsOH-Cr2O3, and CsI-Cr2O3 can be represented by modified Freundlich isotherm expressions. In addition, CsOH vapor interacts extremely with the iron species under accident conditions such that 0.6 wt% FeO in the aerosol can remove 10 to 15 wt% of the CsOH emitted in an accident.
